I have a Logan 400 and am puzzled in why this lathe will not stay in backgear. I have read every posting on the internet on this topic and nothing works for me. My lathe engages the backgears when the lever is pulled to the front of the machine but disengage when the lathe is turned on. Upon complete disassembly of the backgear shaft, etc. I find this is the only way to engage the backgears. Some other internet replies to this problem indicate that the lever must be pushed to the rear to engage the backgear. That configuration is not possible after studying the eccentric shaft. My lathe has, of course, the "bull gear plunger" which works fine and disengages smoothly. My lathe does not have a "back gear plunger' as some more recent models might. These are terms from the Logan 1400 instruction manual which was sent to us in 1956 by Logan Engineering Co. as a 'close substitute' to the Logan 400 manual which they no longer had back then. I do not have a Logan 400 manual. Any suggestions on how to engage the backgears so that they stay engaged?